Air-alkaline wash ammonia-nitrogen stripping device and method

Abstract

An air-alkaline wash ammonia-nitrogen stripping device comprises a stripping tower; an upper part of the stripping tower is provided with an ammonia nitrogen sewage inlet pipe; an air intake pipe anda drainage pipe are disposed at the bottom of the stripping tower; an air outlet is further disposed in the top of the stripping tower; a lye tank is connected to the air intake pipe at the bottom ofthe stripping tower; a gas pump for introducing air is connected to the lye tank; a lye pipe is further connected to the lye tank; the lye pipe communicates with the ammonia nitrogen sewage inlet pipe; and the lye pipe is further provided with a lye pump. By using the air-alkaline wash stripping device, the scale deposit is prevented from generating in the process of adjusting pH with soda lime; the concentration of the CO2 in the stripping tower is reduced and the dosage of alkali is decreased, the operational cost is reduced, and the stripping efficiency can be improved; and in the tail gastreatment, NH3 is absorbed with tap water, thus the cost is lower.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an air alkaline washing ammonia nitrogen stripping device and method. Background technique [0002] Wastewater with high ammonia nitrogen, such as landfill leachate and chemical wastewater, is extremely harmful to the environment. In order to meet the public's continuous improvement in environmental quality requirements, the country has formulated increasingly stringent discharge standards for ammonia nitrogen, and the development of economical and efficient denitrification technology has been Become the focus and hotspot in the field of industrial wastewater treatment. [0003] In recent years, a lot of research has been carried out on the treatment of ammonia nitrogen wastewater at home and abroad. High-concentration ammonia-nitrogen treatment technologies usually fall into two categories: physical-chemical methods and biological treatment methods. Physical method: reverse osm...

AI Technical Summary

Problems solved by technology

However, there is no clear introduction in the current literature on the process of truly breaking the traditional stripping process and adding lye tanks and alkali pumps.

In terms of energy saving and environmental protection, these methods can only play an auxiliary role. In order to truly reduce energy consumption and protect the environment from the root, we must start from the source of the process and explore a new air alkaline washing blowing device

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